PERF_REG_X86_R12
(1ULL << PERF_REG_X86_R12) | \
PT_REGS_OFFSET(PERF_REG_X86_R12, r12),
(1ULL << PERF_REG_X86_R12) | \
id = PERF_REG_X86_R12;
[PERF_REG_X86_R12] = 12,
[PERF_REG_X86_R12] = 15,
case PERF_REG_X86_R12: